How Does Cut Skin and Scrapes Heal?
When you cut yourself, blood flows out of the wound from tiny blood vessels in your skin. Lucky for you, the bleeding soon stops. When blood is exposed to the air, it thickens, or clots.
It plugs up the wound so that you don’t lose too much blood. The clot soon hardens and forms a tough crust, or scab, which provides a protective covering while the wound is healing.
The scab also keeps out harmful germs that might cause infections. Under the scab, new skin tissue grows and repairs the cut. When the wound has healed, the scab falls off.